1) A versatile slang term generally meant to insult an individual for perceived lack of competence, style, panache, or the ability to perform the given task at hand. Likewise, the referenced individual's actions may detrimentally affect the overall spirit of a group (whether temporarily or permanently). It can be used as a noun, verb, or adjective.

2) A derogatory term for someone who utilizes a wheelchair or walks with an abnormal gait.